Dental-instrument grinding device



March 13, 1934. o. SUTER 0,

DENTAL INSTRUMENT GRINDING DEVICE Filed March 7, 1932 INyENTOR 0170 5 M[@J' Patented Mar. 13, 1934 1 UNIT D sTA- rEs rA'rsu'rgoi-rlclinan'ran-msraumm Gamma navroa om sum, Seattle, Wash.

- Application M1, 193:, No. 597,287 7Claims.(CL51239) I This inventionhas reference to improvements A 'dental-tool guiding and supportingmember,

'in grinding devices of the type particularly suitable for sharpeningthe fine cutting and excavating instruments used in dentistry.

Its objects, generally stated, are, to provide a device including avertically extending and rotatable grinding wheel, and a dental toolguide and support by which instruments to beground may be positioned invarious ways and held in a positive manner against the cutting edge ofsaid wheel, the, same permitting predetermined and exact cuts to bemade, either in or beveling; to afford in a device of this class such aguide and support having a transverse sliding movement relative to saidwheel, whereby the cutting operation is facilitated, .and the grindingof pointed instruments may be eflected without injuriously' groovingsaid wheel; and, to make available a grinding device for dental instrugoments which is precise in operation and exceed ingly simple inconstruction.

In the accompanying drawing--- i Figure 1 is a front view illustratingsaid dentaltool guide and support, and the mountings as for.

Fig. 2 is a front elevation of an electric motor,

a grinding wheel mounted thereto, and the mechanism shown in Fig. 1operatively associated with said wheel.

so Fig. 3 is a top view of the same, said motor being broken away, and adental instrument shown as disposed in said dental-tool guide andsupport for grinding.

Fig. 4 is a cross section drawn on the line 4-4, of Fig. 1, andindicates also said grinding .wheel and a dental tool, each broken away,said tool being disposed in said guide and support and in grindingposition against said wheel.

Referring more particularly to the drawing, 1

.m denotes an electric motor, designed to be utilized.

in this device, the same being preferably small in size and providedwith abase 2 relatively large in proportions to give the motorstability, said Fixedly secured in the other end of said portion are apair of rods 12 extending longitudinally and in spaced parallelrelation, the same being providedwlth an end piece 13.

notches are more particularly detailed hereinthereis evident, areinserted through the openings 11 generally designated as 14, is slidablymounted on said rods and disposed between said body portion andendpiece. Said member is provided with a pairof spaced legs 7 15 whichare apertured to 00 receive the rods 12 and afford for the member asliding connection therewith. The top portion of the member 14 isprovided with a plurality of notches v-shaped in cross section, thecentral one 16 being a straight notch, and the notches 17 and 66 18,located on each side of the notch 16, being disposed angularly andconverging rearwardly of said member. As it may be noted particularly inFig. 4 the top edges of said notches are cut angularly, as at 19, thesame extending downwardly 70 in an inclined plane toward the front ofthe member 14. The purpose of this last-named con- I struction willappear when the functions of said after. I

The dental-tool guide and support, just described, is secured inoperative position relative to the grinding wheel 4 by the screws 20,which, as

and engage complementary and threaded openings formed in the casing ofsaid motor. The parts here referred to, when in place, are designed tooccupy about the positions shown in Figs. 2 and 3, the member 14,-and inparticular its notched portion, being very close to the grinding edge ofsaid wheel, but not in contact therewith.

This device is particularly designed and adapted to operate oninstruments known to the dental profession as chisels, hatchets andhoes, which are straight faced tools, and also on angle formers andgingival margin trimmers, which are angularly faced.

In operating the device, and assuming that power has been applied to thewheel and a straight faced tool is to be sharpened, the tool 30 isplaced in the notch 16 and if the edges of the tool adjacent its faceare brought into alignment with the top'edges of said notch, theinclination of said edges 19 away from the wheel is such as to bringthe'face of the tool against the wheel in a position viously if the faceof said toolshould be disposed 1 below the top edgesof said notch but ina plane parallel therewith, the same result will be" obtained. Saidnotch, 'in addition to its usefulness as a guide for the tool inobtaining a proper bevel,

being V-shaped in cross section, serves to gri and steady the tool as itis held therein by the user and thereby insures a square cut for itsface. In sharpening a tool 31 having an angular face, it is placed inone of the side notches, the notch 1'7 being utilized if a right-handcut is required and the notch18 for a left-hand cut, the device thenfunctioning and the tool being sharpened in the same manner as describedheretofore in respect to the straight faced tool 30.

When tools are thus being acted upon by the grinding wheel, the member14, slidably mounted as it is, may be moved transversely of the cuttingedge of said wheel and thereby present to said tools cleaner and moreemcient cutting surfaces than ifsaid tools were sharpened alongcircumferential lines coincident with the locations of the severalnotches. Obviously, the grinding of said tools leaves metallic particlesin the wheel, and the movement of said tools obtained through theslidability of the member 14 serves to spread and thin out saidparticles and will render all portions of the cutting edge of said wheelequally effective in sharpening said tools. Further, the slidingmovement of the said member also serves to distribute the force exertedby said tools against the cutting edge of said wheel, preventinggrooving and the consequent disadvantages thereof.

While the utilization of "an electric motor is preferable insupplyingp'ower to the grinding wheel, on account of its compactness andeven running qualities, it is evident thatsaid wheel may be actuated inother ways, and supporting means provided, other than shown, formounting the dental-tool guide and support in operative positionrelative to a grinding wheel, and still be within the scope of myinvention. And, other changes in and modifications of the constructiondescribed may be made without departing from the spirit of my inventionor sacrificing its advantages, hence it is asked that I be not confinedto the specific structure set forth, except as limited by the appendedclaims.

I claim:

1. In a dental-instrument grinding device, the combination of avertically disposed grinding wheel, and a dental-tool guide and supportmounted oppositely of the cutting edge of said wheel, said-guide andsupport including a tool supporting and guiding member to facilitate thegrinding of dental chisels, hatchets, hoes, angle formers and gingivalmargin trimmers, said member being slidable transversely ofsaid wheeland provided with a plurality of notches, V-shaped in cross section, forguiding and supporting said dental tools in different cutting positionsrelative to said edge.

2. In a dental-instrument grinding device having a vertically disposedgrinding wheel; a dentaltool guide and support positioned oppositely ofthe cutting face of said wheel, comprising a toolguiding and supportingmember to facilitate the grinding of straight-faced and angularly-faceddental tools, said member being slidable-trans-' versely of said faceand having a plurality of straight and angularly disposed notches,V-shaped in cross section, for guiding and supporting said dental toolsin predetermined rinding positions relative to said face.

- 3. In a dental-instrument grinding device hav-,

ing a grinder; a dental-tool guide andsupport, instrumental insharpening and beveling dental tools, comprising a body portion, and atool guidhaving top edges disposed in a plane inclined away from saidgrinder, to afford guide means for beveling said tools.

4. In a dental-instrument grinding device having a vertically disposedgrinding wheel; a dental tool guiding and supporting member instrumentalin sharpening dental tools, said member having a straight notch,V-shaped in cross section, for positioning straight faced dental toolsto said wheel, and a pair of angular notches, V-shaped in cross sectionand reversely disposed, for positioning angularly faced dental tools tosaid wheel in making right-hand and left-hand cuts, the said memberbeing mounted for sliding movement transversely of the cutting edge ofsaid wheel and having a range of movement of such a characteras toprevent grooving of said wheel in grinding said tools.

5. In a dental-instrument grinding device having a motor and avertically disposed grinding wheel rotatable by the motor;instrumentalities to facilitate the sharpening and beveling of dentaltools, comprising a lightweight guide-bar member secured to said motorand extending oppositely of the cutting edge of said wheel, and alightweight dental-tool guide and support slidably mounted in saidmember and manually movable transversely of said edge, said dental-toolguide and support being provided with a plurality of notches forpositioning dental chisels, hatchets, hoes, angle formers and gingivalmargin trimmers in grinding contact with said edge, and said notcheshaving top edges disposed in a plane inclined away from said edge, toafford guides for beveling said tools.

6. In a dental-instrument grinding device having a motor and avertically disposed grinding wheel-actuated by the motor; light-weightinstrumentalities to facilitate the grinding of dental dental'tools tosaid wheel, and a pair of angular.

notches reversely disposed, for positioning angularly faced dental toolsto said wheel in making right-hand and left-hand cuts.

7, In a dental-instrument grinding device having a vertically disposedgrinding wheel; instrumentalities of lightweight construction forpositioning dental tools in grinding contact with said wheel, comprisinga plate-like body portion attachable to a support, a horizontal guideextending from said portion and disposed in substantially the same planeas said portion, and a dentaltool guide'and support slidably mounted onsaid horizontal guide and provided with a flat body portion having anupper edge section carrying a plurality of notches for guiding andsupporting dental tools in different cutting positions relative to saidwheel.-

OTTO SUTER.

